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606 lines
15 KiB
606 lines
15 KiB
/*
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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xrdp: A Remote Desktop Protocol server.
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Copyright (C) Jay Sorg 2009
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*/
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#include "arch.h"
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#include "os_calls.h"
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#include "thread_calls.h"
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#include "trans.h"
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#include "chansrv.h"
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#include "defines.h"
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#include "sound.h"
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#include "clipboard.h"
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#include "devredir.h"
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static tbus g_thread_done_event = 0;
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static struct trans* g_lis_trans = 0;
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static struct trans* g_con_trans = 0;
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static struct chan_item g_chan_items[32];
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static int g_num_chan_items = 0;
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static int g_cliprdr_index = -1;
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static int g_rdpsnd_index = -1;
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static int g_rdpdr_index = -1;
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tbus g_term_event = 0;
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int g_display_num = 0;
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int g_cliprdr_chan_id = -1; /* cliprdr */
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int g_rdpsnd_chan_id = -1; /* rdpsnd */
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int g_rdpdr_chan_id = -1; /* rdpdr */
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/*****************************************************************************/
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/* returns error */
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int APP_CC
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send_channel_data(int chan_id, char* data, int size)
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{
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struct stream* s;
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int chan_flags;
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int total_size;
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int sent;
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int rv;
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s = trans_get_out_s(g_con_trans, 8192);
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if (s == 0)
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{
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return 1;
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}
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rv = 0;
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sent = 0;
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total_size = size;
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while (sent < total_size)
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{
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size = MIN(1600, total_size - sent);
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chan_flags = 0;
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if (sent == 0)
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{
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chan_flags |= 1; /* first */
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}
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if (size + sent == total_size)
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{
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chan_flags |= 2; /* last */
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}
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out_uint32_le(s, 0); /* version */
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out_uint32_le(s, 8 + 8 + 2 + 2 + 2 + 4 + size); /* size */
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out_uint32_le(s, 8); /* msg id */
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out_uint32_le(s, 8 + 2 + 2 + 2 + 4 + size); /* size */
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out_uint16_le(s, chan_id);
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out_uint16_le(s, chan_flags);
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out_uint16_le(s, size);
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out_uint32_le(s, total_size);
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out_uint8a(s, data + sent, size);
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s_mark_end(s);
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rv = trans_force_write(g_con_trans);
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if (rv != 0)
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{
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break;
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}
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sent += size;
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}
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return rv;
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}
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/*****************************************************************************/
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/* returns error */
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static int APP_CC
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send_init_response_message(void)
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{
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struct stream* s;
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g_writeln("xrdp-chansrv: send_init_response_message:");
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s = trans_get_out_s(g_con_trans, 8192);
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if (s == 0)
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{
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return 1;
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}
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out_uint32_le(s, 0); /* version */
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out_uint32_le(s, 8 + 8); /* size */
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out_uint32_le(s, 2); /* msg id */
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out_uint32_le(s, 8); /* size */
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s_mark_end(s);
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return trans_force_write(g_con_trans);
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}
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/*****************************************************************************/
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/* returns error */
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static int APP_CC
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send_channel_setup_response_message(void)
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{
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struct stream* s;
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g_writeln("xrdp-chansrv: send_channel_setup_response_message:");
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s = trans_get_out_s(g_con_trans, 8192);
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if (s == 0)
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{
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return 1;
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}
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out_uint32_le(s, 0); /* version */
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out_uint32_le(s, 8 + 8); /* size */
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out_uint32_le(s, 4); /* msg id */
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out_uint32_le(s, 8); /* size */
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s_mark_end(s);
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return trans_force_write(g_con_trans);
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}
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/*****************************************************************************/
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/* returns error */
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static int APP_CC
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send_channel_data_response_message(void)
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{
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struct stream* s;
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g_writeln("xrdp-chansrv: send_channel_data_response_message:");
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s = trans_get_out_s(g_con_trans, 8192);
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if (s == 0)
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{
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return 1;
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}
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out_uint32_le(s, 0); /* version */
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out_uint32_le(s, 8 + 8); /* size */
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out_uint32_le(s, 6); /* msg id */
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out_uint32_le(s, 8); /* size */
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s_mark_end(s);
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return trans_force_write(g_con_trans);
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}
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/*****************************************************************************/
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/* returns error */
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static int APP_CC
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process_message_init(struct stream* s)
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{
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g_writeln("xrdp-chansrv: process_message_init:");
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return send_init_response_message();
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}
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/*****************************************************************************/
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/* returns error */
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static int APP_CC
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process_message_channel_setup(struct stream* s)
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{
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int num_chans;
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int index;
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int rv;
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struct chan_item* ci;
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g_writeln("xrdp-chansrv: process_message_channel_setup:");
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in_uint16_le(s, num_chans);
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g_writeln("xrdp-chansrv: process_message_channel_setup: num_chans %d",
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num_chans);
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for (index = 0; index < num_chans; index++)
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{
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ci = &(g_chan_items[g_num_chan_items]);
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g_memset(ci->name, 0, sizeof(ci->name));
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in_uint8a(s, ci->name, 8);
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in_uint16_le(s, ci->id);
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in_uint16_le(s, ci->flags);
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g_writeln("xrdp-chansrv: process_message_channel_setup: chan name %s "
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"id %d flags %8.8x", ci->name, ci->id, ci->flags);
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if (g_strcasecmp(ci->name, "cliprdr") == 0)
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{
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g_cliprdr_index = g_num_chan_items;
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g_cliprdr_chan_id = ci->id;
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}
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else if (g_strcasecmp(ci->name, "rdpsnd") == 0)
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{
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g_rdpsnd_index = g_num_chan_items;
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g_rdpsnd_chan_id = ci->id;
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}
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else if (g_strcasecmp(ci->name, "rdpdr") == 0)
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{
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g_rdpdr_index = g_num_chan_items;
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g_rdpdr_chan_id = ci->id;
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}
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g_num_chan_items++;
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}
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rv = send_channel_setup_response_message();
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if (g_cliprdr_index >= 0)
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{
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clipboard_init();
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}
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if (g_rdpsnd_index >= 0)
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{
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sound_init();
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}
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if (g_rdpdr_index >= 0)
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{
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dev_redir_init();
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}
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return rv;
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}
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/*****************************************************************************/
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/* returns error */
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static int APP_CC
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process_message_channel_data(struct stream* s)
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{
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int chan_id;
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int chan_flags;
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int rv;
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int length;
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int total_length;
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in_uint16_le(s, chan_id);
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in_uint16_le(s, chan_flags);
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in_uint16_le(s, length);
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in_uint32_le(s, total_length);
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g_writeln("xrdp-chansrv: process_message_channel_data: chan_id %d "
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"chan_flags %d", chan_id, chan_flags);
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rv = send_channel_data_response_message();
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if (rv == 0)
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{
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if (chan_id == g_cliprdr_chan_id)
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{
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rv = clipboard_data_in(s, chan_id, chan_flags, length, total_length);
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}
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else if (chan_id == g_rdpsnd_chan_id)
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{
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rv = sound_data_in(s, chan_id, chan_flags, length, total_length);
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}
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else if (chan_id == g_rdpdr_chan_id)
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{
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rv = dev_redir_data_in(s, chan_id, chan_flags, length, total_length);
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}
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}
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return rv;
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}
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/*****************************************************************************/
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/* returns error */
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static int APP_CC
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process_message_channel_data_response(struct stream* s)
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{
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g_writeln("xrdp-chansrv: process_message_channel_data_response:");
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return 0;
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}
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/*****************************************************************************/
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/* returns error */
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static int APP_CC
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process_message(void)
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{
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struct stream* s;
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int size;
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int id;
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int rv;
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char* next_msg;
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if (g_con_trans == 0)
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{
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return 1;
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}
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s = trans_get_in_s(g_con_trans);
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if (s == 0)
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{
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return 1;
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}
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rv = 0;
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while (s_check_rem(s, 8))
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{
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next_msg = s->p;
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in_uint32_le(s, id);
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in_uint32_le(s, size);
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next_msg += size;
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switch (id)
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{
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case 1: /* init */
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rv = process_message_init(s);
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break;
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case 3: /* channel setup */
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rv = process_message_channel_setup(s);
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break;
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case 5: /* channel data */
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rv = process_message_channel_data(s);
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break;
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case 7: /* channel data response */
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rv = process_message_channel_data_response(s);
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break;
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default:
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g_writeln("xrdp-chansrv: process_message: error in process_message "
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"unknown msg %d", id);
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break;
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}
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if (rv != 0)
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{
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break;
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}
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s->p = next_msg;
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}
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return rv;
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}
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/*****************************************************************************/
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/* returns error */
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int DEFAULT_CC
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my_trans_data_in(struct trans* trans)
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{
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struct stream* s;
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int id;
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int size;
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int error;
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if (trans == 0)
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{
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return 0;
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}
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if (trans != g_con_trans)
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{
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return 1;
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}
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g_writeln("xrdp-chansrv: my_trans_data_in:");
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s = trans_get_in_s(trans);
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in_uint32_le(s, id);
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in_uint32_le(s, size);
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error = trans_force_read(trans, size - 8);
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if (error == 0)
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{
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/* here, the entire message block is read in, process it */
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error = process_message();
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}
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return error;
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}
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/*****************************************************************************/
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int DEFAULT_CC
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my_trans_conn_in(struct trans* trans, struct trans* new_trans)
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{
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if (trans == 0)
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{
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return 1;
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}
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if (trans != g_lis_trans)
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{
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return 1;
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}
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if (g_con_trans != 0) /* if already set, error */
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{
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return 1;
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}
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if (new_trans == 0)
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{
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return 1;
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}
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g_writeln("xrdp-chansrv: my_trans_conn_in:");
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g_con_trans = new_trans;
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g_con_trans->trans_data_in = my_trans_data_in;
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g_con_trans->header_size = 8;
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/* stop listening */
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trans_delete(g_lis_trans);
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g_lis_trans = 0;
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return 0;
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}
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/*****************************************************************************/
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static int APP_CC
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setup_listen(void)
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{
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char text[256];
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int error;
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if (g_lis_trans != 0)
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{
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trans_delete(g_lis_trans);
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}
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g_lis_trans = trans_create(1, 8192, 8192);
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g_lis_trans->trans_conn_in = my_trans_conn_in;
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g_snprintf(text, 255, "%d", 7200 + g_display_num);
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error = trans_listen(g_lis_trans, text);
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if (error != 0)
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{
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g_writeln("xrdp-chansrv: setup_listen: trans_listen failed");
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return 1;
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}
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return 0;
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}
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/*****************************************************************************/
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THREAD_RV THREAD_CC
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channel_thread_loop(void* in_val)
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{
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tbus objs[32];
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int num_objs;
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int timeout;
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int error;
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THREAD_RV rv;
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g_writeln("xrdp-chansrv: channel_thread_loop: thread start");
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rv = 0;
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error = setup_listen();
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if (error == 0)
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{
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timeout = 0;
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num_objs = 0;
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objs[num_objs] = g_term_event;
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num_objs++;
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trans_get_wait_objs(g_lis_trans, objs, &num_objs, &timeout);
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while (g_obj_wait(objs, num_objs, 0, 0, timeout) == 0)
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{
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if (g_is_wait_obj_set(g_term_event))
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{
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g_writeln("xrdp-chansrv: channel_thread_loop: g_term_event set");
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clipboard_deinit();
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sound_deinit();
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dev_redir_deinit();
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break;
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}
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if (g_lis_trans != 0)
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{
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if (trans_check_wait_objs(g_lis_trans) != 0)
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{
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g_writeln("xrdp-chansrv: channel_thread_loop: "
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"trans_check_wait_objs error");
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}
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}
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if (g_con_trans != 0)
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{
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if (trans_check_wait_objs(g_con_trans) != 0)
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{
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g_writeln("xrdp-chansrv: channel_thread_loop: "
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"trans_check_wait_objs error resetting");
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/* delete g_con_trans */
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trans_delete(g_con_trans);
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g_con_trans = 0;
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/* create new listener */
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error = setup_listen();
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if (error != 0)
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{
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break;
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}
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}
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}
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clipboard_check_wait_objs();
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sound_check_wait_objs();
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dev_redir_check_wait_objs();
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timeout = 0;
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num_objs = 0;
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objs[num_objs] = g_term_event;
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num_objs++;
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trans_get_wait_objs(g_lis_trans, objs, &num_objs, &timeout);
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trans_get_wait_objs(g_con_trans, objs, &num_objs, &timeout);
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clipboard_get_wait_objs(objs, &num_objs, &timeout);
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sound_get_wait_objs(objs, &num_objs, &timeout);
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dev_redir_get_wait_objs(objs, &num_objs, &timeout);
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}
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}
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trans_delete(g_lis_trans);
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g_lis_trans = 0;
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trans_delete(g_con_trans);
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g_con_trans = 0;
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g_writeln("xrdp-chansrv: channel_thread_loop: thread stop");
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g_set_wait_obj(g_thread_done_event);
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return rv;
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}
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/*****************************************************************************/
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void DEFAULT_CC
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term_signal_handler(int sig)
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{
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g_writeln("xrdp-chansrv: term_signal_handler: got signal %d", sig);
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g_set_wait_obj(g_term_event);
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}
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/*****************************************************************************/
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void DEFAULT_CC
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nil_signal_handler(int sig)
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{
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g_writeln("xrdp-chansrv: nil_signal_handler: got signal %d", sig);
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}
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/*****************************************************************************/
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static int APP_CC
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get_display_num_from_display(char* display_text)
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{
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int index;
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int mode;
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int host_index;
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int disp_index;
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int scre_index;
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char host[256];
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char disp[256];
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char scre[256];
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index = 0;
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host_index = 0;
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disp_index = 0;
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scre_index = 0;
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mode = 0;
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while (display_text[index] != 0)
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{
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if (display_text[index] == ':')
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{
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mode = 1;
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}
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else if (display_text[index] == '.')
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{
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mode = 2;
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}
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else if (mode == 0)
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{
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host[host_index] = display_text[index];
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host_index++;
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}
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else if (mode == 1)
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{
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disp[disp_index] = display_text[index];
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disp_index++;
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}
|
|
else if (mode == 2)
|
|
{
|
|
scre[scre_index] = display_text[index];
|
|
scre_index++;
|
|
}
|
|
index++;
|
|
}
|
|
host[host_index] = 0;
|
|
disp[disp_index] = 0;
|
|
scre[scre_index] = 0;
|
|
g_display_num = g_atoi(disp);
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
int DEFAULT_CC
|
|
main(int argc, char** argv)
|
|
{
|
|
int pid;
|
|
char text[256];
|
|
char* display_text;
|
|
|
|
g_init(); /* os_calls */
|
|
pid = g_getpid();
|
|
g_writeln("xrdp-chansrv: main: app started pid %d(0x%8.8x)", pid, pid);
|
|
g_signal_kill(term_signal_handler); /* SIGKILL */
|
|
g_signal_terminate(term_signal_handler); /* SIGTERM */
|
|
g_signal_user_interrupt(term_signal_handler); /* SIGINT */
|
|
g_signal_pipe(nil_signal_handler); /* SIGPIPE */
|
|
display_text = g_getenv("DISPLAY");
|
|
g_writeln("xrdp-chansrv: main: DISPLAY env var set to %s", display_text);
|
|
get_display_num_from_display(display_text);
|
|
if (g_display_num == 0)
|
|
{
|
|
g_writeln("xrdp-chansrv: main: error, display is zero");
|
|
return 1;
|
|
}
|
|
g_writeln("xrdp-chansrv: main: using DISPLAY %d", g_display_num);
|
|
g_snprintf(text, 255, "xrdp_chansrv_%8.8x_main_term", pid);
|
|
g_term_event = g_create_wait_obj(text);
|
|
g_snprintf(text, 255, "xrdp_chansrv_%8.8x_thread_done", pid);
|
|
g_thread_done_event = g_create_wait_obj(text);
|
|
tc_thread_create(channel_thread_loop, 0);
|
|
while (!g_is_wait_obj_set(g_term_event))
|
|
{
|
|
if (g_obj_wait(&g_term_event, 1, 0, 0, 0) != 0)
|
|
{
|
|
g_writeln("xrdp-chansrv: main: error, g_obj_wait failed");
|
|
break;
|
|
}
|
|
}
|
|
while (!g_is_wait_obj_set(g_thread_done_event))
|
|
{
|
|
/* wait for thread to exit */
|
|
if (g_obj_wait(&g_thread_done_event, 1, 0, 0, 0) != 0)
|
|
{
|
|
g_writeln("xrdp-chansrv: main: error, g_obj_wait failed");
|
|
break;
|
|
}
|
|
}
|
|
/* cleanup */
|
|
g_delete_wait_obj(g_term_event);
|
|
g_delete_wait_obj(g_thread_done_event);
|
|
g_writeln("xrdp-chansrv: main: app exiting pid %d(0x%8.8x)", pid, pid);
|
|
g_deinit(); /* os_calls */
|
|
return 0;
|
|
}
|